No Discharge Areas (NDAs)

"No Discharge Area" (NDA) designates waterways where discharge of any waste, treated or untreated, is illegal and where only Type III MSDs are legal.

While in an NDA, locking the door to the toilet with a padlock or door handle key lock is an acceptable method of securing the Type I or II MSD. Type III MSDs are recommended for long-term operation in an NDA and must be secured as described under "Discharge of Sewage and Graywater."

Currently, the Environmental Protection Agency (EPA) has approved the following NDAs in local coastal waters.

• Connecticut: All waters.
• New York: Long Island Sound, including the open waters, harbors, bays, and navigable tributaries of the Sound and a portion of the East River, from the Hell Gate Bridge in the west to the northern bounds of the Block Island Sound in the east. Included in the NDA are: Peconic Estuary and East Hampton, Mamaroneck Harbor, Huntington–Northport Bay Complex, Port Jefferson Complex, and Hudson River.
• Rhode Island: All waters.

Visit the EPA website for a list of NDAs in New England waters.